" The nature and etiology of leukemia are unknown " (1). Some authors (2, 3, 4, 5, 6, 7, 8) are in favor of classifying the leukemias as malignant neoplasms of the blood-forming organs, because of the formation of leukocytes in unaccustomed organs, the new growth of leukemic tissue, and the flooding of the blood stream with abnormal primitive cells. Others (9) prefer to consider leukemia as a type of benign tumor formation, or tissue metaplasia, or simply as an excessive, unregulated production… CONTINUE READING